Air valve



Aug. 20, 1929. w. F. RosEFlELD 1,725,674

AIR VALVE Filed June 19, 1928 mmf@ ATTORNEY Patented Aug. 20, 1929.

UNITED STATES WILLIAM F. ROSENFIELD, OF WASHINGTON, DISTRICT F COLUMBIA.

AIR VALVE.

Application filed .Tune 19,

rlhis invention relates to an auxiliary air valve.

An object oi the invention is the provision of an air valve adapted to be connected with the intake manitold ot an internal combustion engine and at a point between the engine and the throttle valve in the carburetor for admitting the proper quantity ot auxiliary air to the mixture in accordance with the needs otl the engine at varying speeds.

Another object oi' the invention is the provision ot an auxiliary air supply device adapted to be connected at a point on the intake manifold which is between the usual throttle valve and the engine, and in which a valve is suspended out of engagement with a seat during the normal operation of the engine, the valve being drawn into the seat against the action ot a spring when the throttle valve is closed, or substantially closed, jor preventing an auxiliary air supply to the mixture at this time, the spring moving the valve away from its seat when the throttle valve is open and when the suction in the intake pipe is insutlicient to overcome the action of the spring.

rlhis invention will be best understood from a consideration ot the following detailed description in connection with the accompanying drawings;` nevertheless, it is to be understood that the invention is not conlined to the disclosure being susceptible oi such changes and modifications as shall define no material departure from the salient features of the invention as expressed in the appended claims.

In the drawings Figure 1 is a side View in elevation ot an engine showing my auxiliary air intake device attached to the usual intake pipe,

Figure 2 is a vertical section of the auxiliary air device taken along the line 2-2 oi' Fig. 3,

Figure 3 is a horizontal section taken along the line 3-3 ot' Fig. 2.

Referring more particularly to the drawings designates an internal combustion engine which is supplied with a suitable mixture from a carburetor, not shown, and through an intake pipe 11. A throttle valve 12 is adapted to control the flow ot mixture to the engine, in a manner which is well known.

The intake pipe 11 is provided with an opening 13 into which is threaded a nipple 1928. Serial No. 286,682.

14. A body 15 is threaded at 16 on the nipple 14 and has a centra )assage 17 for connecting a Ichamber 18 with the interior of the intake manifold 11. ylthe body member has its interior wall provided with a plurality ot ribs 19 provided with passages 20, one ot the sages being in open communication with a horizontal passage 21. The passages 2O are substantially co-extensive in length with the height of the chamber 18.

A collar 22 tits snugly on the body member and has a port 23 adapted to be alined with ,he passage 21 whereby atmospheric air may enter the passage 21 and circulate by means of the vertical passage 2O into chamber 18, where it is drawn through the lcentral passage 17 in a manner which will be presently explained. The collar 22 has a slot 24 which receives a bolt 25 threaded into the body member 15, for maintaining the collar in place while limiting the movement ot said collar.

A plug has a reduced portion 31 threaded at 32 into the outer end ot the hollow body 15. A shoulder 33 in the plug 30 engages the outer end ot' the body member 15 and aids in sealing the chamber 18 at its outer end from the atmosphere.

A housing' or sleeve 34 is provided with external threads 35 adapted to be screwed into the internal threads 36 of the plug 30. A nut 37 aids in securing the housing 34 in position in the plug. The inner end of housing is closed, as shown at 38, and is seated on'the inner end of the plug 30, and is also engaged by a spring 39 located within the housing 34. The outer end of the housing is closed by a cap nut 40 A valve is adapted to engage a seat 46 in the passage 17 and is supported by a stem 47 which is slidably mounted in passages 48 and 49 formed respectively in the plug 30 and the inner portion of the housing 34. This stem also is slidable in a passage 50 in the cap nut 40. A nut 51 is threaded on the stem 47 and engages the outer end oi. the spring 39.

The operation of my device is as follows: The spring 39 suspends the valve 45 by means of the nut 51 and the stem 47, and retains it in an inoperative position and in spaced relation with the seat 46 so that atmospheric air which enters the passage 21 and circulates through I cause the ball valve 45 to be seated thereby cutting off auxiliary air to the intake manifold. As soon, however, as the throttle valve is open and the vacuum is broken in the intake manifold, the `spring 39 will move the valve 45 from the seat 46 to permit auxiliary air to enter the intake manifold 11. The vertioally disposed passages 2O are arranged around the ball valve 45 so that the air enter ing the vertically disposed passages adjacent the transverse passage 2l will pass around the bottom of the ball valve 45 in order that it will be easily distributed to the passage 17.

By rotating the threaded housing 34 aiter 'T the releasing of the nut 37, the tension on the spring 39 may be varied in order to properly position the valve for its seating and for its release from its seat during variations in the suction produced in the intake manifold.

l. An auxiliary air intake valve comprising a hollow body provided with an air inlet and a discharge port, a valve in the hollow body, a seat engaged by the valve when said valve is moved towards the discharge port for Cutting off the flow of air through the body, a spring for retaining the valve normally unseated, a tubular member threaded into the body and housing the spring.

2. An auxiliary air intake valve comprising a hollow body provided with an air inlet and a discharge port, a valve in the hollow body, a seat engaged by the valve when said valve is moved towards the discharge port for cutting off the flow of air through the body, a spring for retaining the valve normally unseated, a tubular member threaded into the body and housing` the spring, the tubular member being adjustably mounted in the body for varying the tension on the spring.

VILLIAM F. ROSENFIELD. 

